BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 26, 2009
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.  
Weather: Overcast
Temperature: 70F, Dew point: 70F, Wind: SSE AT 15G22 kt
Sea-level pressure: 29.95 inches Hg, rising
Visibility: 1 mile prevailing; variable all directions
at observation time
24-hour precipitation: 0.05 inches
6-hour minimum temp: 68F
BHO SA 1155 E5 OVC 1F 143/70/70/1615G22/995/
STRA DFTG OVR SMT VSBY 1V3 ALQDS/ 8/7// 53003 6005/ 70005 10070 20068
 
10 A.M.
Weather: Chaotic sky; hazy
Temperature: 75F, Dew point: 71F, Wind: SSE 12 kt
Sea-level pressure: 29.95 inches Hg, falling
Visibility: 8 miles
BHO SA 1455 40 SCT 120 SCT 220 OVC 8H 142/75/71/1612/995/
CHAOTIC SKY FEW BINOVC ALQDS/ 8/298 58001
 
1 P.M.  
Weather: Scattered stratocumulus; broken altocumulus
Temperature: 81F, Dew point: 70F, Wind: SSE at 18G28 kt
Sea-level pressure: 29.93 inches Hg, falling
Visibility: 15 miles
6-hourly max. temp: 81F
BHO SA 1755 40 SCT 120 BKN 15 136/81/70/1718G28/993/
HAZY PK WND 1728/1748/ 8/802 56006 10081 20070
 
WEATHER SUMMARY FOR SATURDAY, JULY 25
 
TEMPERATURE (DEGREES F)
MAX.....83    NORMAL.....82
MIN.....61    NORMAL.....63
MEAN....72    NORMAL.....73
 
DEPARTURE FROM 30-YEAR AVERAGE..........-1
TOTAL DEPARTURE FOR THE MONTH.........-111  [-4.6 DEGREES/DAY]
 
HEATING DEGREE DATA WILL RESUME IN SEPTEMBER
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............30 SSE  AT  10:59 P.M.
                   AEROVANE..............28 SSE  AT  10:59 P.M.
                   ASOS..................29 S    AT  10:59 P.M.     
                   DAVIS.................26 S    AT  10:59 P.M.
FASTEST MILE FOR YESTERDAY...............20 SSE  AT  10:58 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............29 S    AT  10:59 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE...........26 S    AT  10:59 P.M.
AVERAGE WIND SPEED AND DIRECTION.......11.1 SSW
                   ASOS................10.7
                   DAVIS...............10.0 SSW [193 DEG]
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.05  DEPARTURE....-0.07
                         ASOS..............0.05
TOTAL PRECIPITATION FOR THE MONTH..........6.87  DEPARTURE....+3.85
                         ASOS..............7.01
TOTAL PRECIPITATION FOR THE YEAR..........30.51  DEPARTURE....+1.82
                         ASOS.............31.66
 
PRELIMINARY CLIMATE SUMMARY FOR JULY 2009 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
7/1  62/57/60/-10/0.51/000/00   25 NNE   TSTM
7/2  66/56/61/-9/1.00/000/00    29 SSW   TSTM
7/3  75/58/67/-3/T/283/31       23 WSW
7/4  77/59/68/-2/0/838/92       43 W      
7/5  78/54/66/-5/0/856/94       33 W     
7/6  79/60/70/-1/0/883/97       20 SSE
7/7  66/58/62/-9/0.73/027/03    28 SE    TSTM
7/8  67/56/62/-9/0.23/091/10    27 NNE   TSTM
7/9  66/55/61/-10/0/689/76      23 NE
7/10 76/54/65/-6/0/896/99       21 SW
7/11 77/56/67/-5/0.29/686/76    36 S
7/12 78/60/69/-3/0.33/650/72    30 SSW   TSTM
7/13 76/55/66/-6/0/802/89       32 SW 
7/14 75/56/66/-6/0/567/63       25 WNW
7/15 79/55/67/-5/0/826/92       30 WSW
7/16 77/62/70/-2/T/161/18       30 S
7/17 86/65/76/+4/0.01/582/65    24 ESE
7/18 84/66/75/+3/0.35/447/50    25 SSW   TSTM
7/19 80/62/71/-1/0/865/97       27 WSW
7/20 80/64/72/0/0/481/54        16 E
7/21 66/61/64/-8/0.62/000/00    29 NNE
7/22 77/61/69/-3/T/.../..       15 W
7/23 72/60/66/-6/0.68/.../..    35 NE
7/24 69/60/65/-8/2.07/.../..    46 NE    AERO 45 NE
7/25 83/61/72/-1/0/.../..       30 SSE
 
NEW DAILY RECORDS FOR JULY 2009 TO DATE...
7/24: New record peak gust 46 MPH NE at 3:32 A.M.
      surpasses previous record of 43 MPH S IN 2008
 
DAILY EXTREMES
 
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JULY 26
HIGH 97F IN 1963
LOW 47F IN 1920
PRE 2.05 INS IN 1899
WIND 74e MPH NNW IN 1940
 
RECORDS FOR JULY 27
HIGH 95F IN 1949, 1963
LOW 50F IN 1920, 2001
PRE 4.01 INS IN 1979
WIND 47 MPH ENE IN 1984
 
TODAY'S REPORT PREPARED BY: Andrew Hoell